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Finding the Fourth Proportional to 8,317.76, 11,475.50 and 6,404.16

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Solution

The fourth proportional to 8,317.76, 11,475.50 and 6,404.16 is: 8,835.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,317.76 : 11,475.50 = 6,404.16 : x
  2. Step 2: Convert to fraction form
    8,317.76/11,475.50 = 6,404.16/x
  3. Step 3: Cross multiply
    8,317.76x = 11,475.50 × 6,404.16
  4. Step 4: Simplify right side
    8,317.76x = 73,490,938.08
  5. Step 5: Solve for x
    x = 73,490,938.08/8,317.76
  6. Step 6: Final answer
    x = 8,835.42

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.